Maybe you don't think it's worth your while to get the training necessary to continue in your former career. You may have discovered other interests during your hiatus and you want to look into a different career. Or maybe your chance of getting a job in your previous field are slim due to changes in the market. In that case, you will have to decide what career choice to make.
Fortunately there are many resources to help you do that. You can meet with a career development professional who will do a self assessment which looks at your values, interests, skills, and personality in order to determine what careers you are best suited for. Together you'll consider these options and ultimately come up with your future occupation.
Once you have come up with a list of possible occupations, you can begin to explore them, using published resources as well as informational interviews. Informational interviews involve speaking to people who work in the field in which you are interested.
Eventually, after learning enough about the various options, you'll pick one. You may have to earn a degree or certificate, learn some new skills, and brush up on some old ones before you can actually enter your chosen field. You've taken time off for your family, now it's time to do something for yourself. Good luck.